Superconducting 2D system with lifted spin degeneracy: Mixed single-triplet state
Superconducting 2D system with lifted spin degeneracy: Mixed single-triplet state
复制标题
DOI：
10.1103/physrevlett.87.037004
复制
发表时间：
2001-07-16
影响因子：
8.6
通讯作者：
Rashba, EI
中科院分区：
文献类型：
--
作者：
Gor'kov, LP;Rashba, EI
受最近实验结果的启发，我们发展了一种二维金属的超导态理论，没有反转对称性，对场效应晶体管中或吸附离子掺杂边界附近的表面超导层的几何形状进行建模。在这样的系统中，双重自旋简并被自旋轨道相互作用提升，并且单重态和三重态配对在库珀对的波函数中混合。结果，自旋磁化率变为各向异性，奈特位移在T = 0时保持有限且相当高的值。
Motivated by recent experimental findings, we have developed a theory of the superconducting state for 2D metals without inversion symmetry modeling the geometry of a surface superconducting layer in a field-effect transistor or near the boundary doped by adsorbed ions. In such systems the twofold spin degeneracy is lifted by spin-orbit interaction, and singlet and triplet pairings are mixed in the wave function of the Cooper pairs. As a result, spin magnetic susceptibility becomes anisotropic and Knight shift retains finite and rather high value at T = 0.